Tuesday, March 2, 2010

test 14

Red Iron Oxide 9%
Cone 6 Oxidation

Kona F-4 44.3
Whiting 16.5
Zinc Oxide 7.8
EPK 1.3
Flint 5.2
Gerst Bor. 15.0
Red Iron Oxide 9.0

Very unstable. As an exterior glaze this is incredibly runny and drippy. This may be a nice liner glaze, and pools in the base of a cup to a rich deep black/brown.

This glaze is one of 18 tests. Students of the fall 2009 semester tested in 100 g. batches, recalculated to assure glaze stability, then further tested 500 g. batches, and finally compiled a list of 18 glazes to go through a uniformed batch test. All batches of this 18 recipe set were mixed through a process of precise measurements, 60 and 80 mesh screening, were dipped on cone 04 bisque for 3 seconds, and were finally fired to a witnessed cone 6 oxidation in an electric kiln. (Firing schedules are to follow shortly).

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